more solutions for caveat with pacman's server error limit

1 files changed, 43 insertions, 0 deletions

diff --git a/patches/0001-support-http-header-to-indicate-an-expected-failure.patch b/patches/0001-support-http-header-to-indicate-an-expected-failure.patch
new file mode 100644
index 0000000..6bc977a
--- /dev/null
+++ b/patches/0001-support-http-header-to-indicate-an-expected-failure.patch
@@ -0,0 +1,43 @@
+From b50863ad56c3c972e4bfbc9108523fee267d63fa Mon Sep 17 00:00:00 2001
+From: Christian Hesse <mail@eworm.de>
+Date: Fri, 21 May 2021 09:52:34 +0200
+Subject: [PATCH] support http header to indicate an expected failure
+
+By setting an extra HTTP header 'X-Pacman-Expected-Failure' the server can
+indicate that the failure is expected. The next server is tried without
+error message and without increasing the server's error count.
+
+This can be used by servers that are not expected to be complete, for
+example when serving a local cache.
+
+Signed-off-by: Christian Hesse <mail@eworm.de>
+---
+ lib/libalpm/dload.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/lib/libalpm/dload.c b/lib/libalpm/dload.c
+index 7c27c3ea..d39125ca 100644
+--- a/lib/libalpm/dload.c
++++ b/lib/libalpm/dload.c
+@@ -277,6 +277,7 @@ static size_t dload_parseheader_cb(void *ptr, size_t size, size_t nmemb, void *u
+ 	const char *fptr, *endptr = NULL;
+ 	const char * const cd_header = "Content-Disposition:";
+ 	const char * const fn_key = "filename=";
++	const char * const xpef_header = "X-Pacman-Expected-Failure:";
+ 	struct dload_payload *payload = (struct dload_payload *)user;
+ 	long respcode;
+ 
+@@ -303,6 +304,13 @@ static size_t dload_parseheader_cb(void *ptr, size_t size, size_t nmemb, void *u
+ 		}
+ 	}
+ 
++	/* By setting an extra HTTP header 'X-Pacman-Expected-Failure' the server can
++	   indicate that the failure is expected. The next server is tried without
++	   error message and without increasing the server's error count. */
++	if(_alpm_raw_ncmp(xpef_header, ptr, strlen(xpef_header)) == 0) {
++		payload->errors_ok = 1;
++	}
++
+ 	curl_easy_getinfo(payload->curl, CURLINFO_RESPONSE_CODE, &respcode);
+ 	if(payload->respcode != respcode) {
+ 		payload->respcode = respcode;